Serialized (on default with JSON) data passed to the client by a developer on an AJAX request. It's accessible via "event.data" syntax. Both primitive types and complex types such as arrays and collections can be serialized and used with data

IDs of components that will participate in the "execute" portion of the Request Processing Lifecycle. Can be a single ID, a space or comma separated list of IDs, or an EL Expression evaluating to an array or Collection. Any of the keywords "@this", "@form", "@all", "@none", "@region" may be specified in the identifier list. Some components make use of additional keywords

IDs of components that will participate in the "render" portion of the Request Processing Lifecycle. Can be a single ID, a space or comma separated list of Id's, or an EL Expression evaluating to an array or Collection. Any of the keywords "@this", "@form", "@all", "@none", "@region" may be specified in the identifier list. Some components make use of additional keywords

If true, indicate that this particular Ajax transaction is a value reset transaction. This will cause resetValue() to be called on any EditableValueHolder instances encountered as a result of this ajax transaction. If not specified, or the value is false, no such indication is made.